Reflux und Essstörungen - "Ein Fall für Zwei"

The term erosion describes tooth wear caused by acids. Erosions can be a consequence of medical problems like gastroesophageal reflux disease or eating disorders which lead to a regular contact of gastric acid with teeth. These, so called intrinsic erosions occur in such typical locations within the dental arches that even in the absence of other symptoms gastric acid can be assumed to be the cause. Dental professionals may thus be the first to discover and diagnose the underlying medical problem. A good cooperation between the physician and the dentist is consequently necessary for a causal treatment of the patient. Parallel to the therapy of the underlying disease practical dental prophylactic measures like chewing gum und fluoride rinses are recommended

Foetor ex ore und Halitosis. Was steckt hinter dem Mundgeruch?

Rund jede vierte Person hat Mundgeruch. Dabei muss zwischen Foetor ex ore (90%, nur im Mundatem perzeptierbar) und Halitosis (10%, im Mund- und/oder Nasenatem feststellbar) unterschieden werden. Eine entsprechende Differentialdiagnose ist Voraussetzung für die Kausaltherapie. Prophylaxe und Therapie basieren auf der mechanischen und chemischen Reduktion der Erreger

Essstörungen (II): Zahnmedizinische Aspekte

Patients suffering from eating disorders exhibit oral symptoms indicative to the otherwise concealed illness. The most striking features are the intrinsic erosions due to the regular surreptitious vomiting. They occur in very typical locations within the dental arches and have been termed "perimolysis". Dental professionals are often the first to discover and diagnose eating disorders by detecting perimolysis and consequently face the difficult task to motivate the patients--who often deny their illness--to seek psychiatric help and dental care. Such motivation must be done while respecting the patients' integrity and sense of self-worth. The primary goal of dental care is to preserve the remaining teeth and to prevent further erosive loss of dental hard tissue. The key elements of a dental preventive programme based on pathophysiologic grounds are to enhance local defence mechanisms, to offer chemical and mechanical protection and to diminish abrasive and erosive challenges. Dental restorative therapy must be part of a combined medical and dental treatment plan and should not be started before the eating disorder has been treated and the patients are considered to have stable prognosis. In view of the young age of the patients, the large extension of the erosive lesions and in order to avoid endodontological treatment of mostly sound pulps, non-invasive restorative concepts using adhesive technology should be preferably used. Prophylactic measures and restorative treatment are covered by health insurance (KGV; KLV 18c, 7) if the patients undergo psychiatric or similar adequate treatment

The prevalence of approximal caries in patients after fixed orthodontic treatment and in untreated subjects: A retrospective, cross-sectional study on bitewing radiographs

Objective: The aim of this retrospective, cross-sectional study was to investigate the prevalence of approximal carious lesions in patients after fixed multibracket therapy and in subjects without orthodontics on bitewing radiographs. Material and methods: Bitewing radiographs of 104orthodontically treated patients with fixed multibracket appliances were compared to those of 111untreated subjects. The individuals in both groups were between 15 and 16.25years of age when radiographs were taken. The test group with orthodontics was recruited from the archive of the Department of Orthodontics at the University of Zürich. The untreated control group was selected randomly from 16communities in the Canton of Zürich. The approximal surfaces of the permanent premolars and molars of all subjects were assessed by two calibrated investigators. Results: The average number of enamel lesions in the test group after fixed orthodontic treatment was lower than in the control group (0.57 vs. 1.85, p < 0.001). The same was found for dentin lesions (0.06 vs. 0.49, p < 0.001). The distribution of lesions was similar in both groups. Conclusion: Fewer approximal carious lesions were detected in the test group after fixed multibracket appliances than in the age-matched control group without orthodontic treatmen

Further caries decline in Swiss recruits from 1996 to 2006

Swiss army recruits (N = 606) from the army base at Thun were dentally examined with a standardized method in the year 2006. The results were compared with those of previous surveys (1985 and 1996). The mean DM6FT-value in the year 2006 was 3.11, whereas in 1996 it had been clearly higher (4.95). This corresponds to a caries decline of 37%. The observed caries decline can only partly be explained. Recruits, who were smokers, showed an increased caries experience. Recruits of the German-speaking part of Switzerland who had profited from oral health lessons by oral health instructors in Kindergarten and primary schools did not differ in caries experience from recruits of the French-speaking part of Switzerland

In vitro tooth cleaning efficacy of electric toothbrushes around brackets

This in vitro study assessed the cleaning efficacy of different electric toothbrushes around upper incisor brackets. Standard and Mini Diamond™ brackets were fixed on black-stained teeth. The teeth were coated with white titanium oxide and brushed in a machine twice for 1 minute each. Twelve different brush heads with either a wiping or an oscillating-rotating action were tested. After brushing, the teeth were scanned, the black surfaces were assessed planimetrically and a modified plaque index for orthodontic patients (PIOP) was introduced. Tooth areas, which were black again after brushing indicated tooth surface contact of the filaments and were expressed as a percentage of total area. The remaining white areas around the brackets indicated 'plaque-retentive' niches. Analysis of variance was used for individual comparison of the brush types. Bonferroni/Dunn adjustment was applied for multiple testing. The Sonicare® toothbrush handle with the brush head 'Compact ProResults' (81.7 per cent) and the brush head 'Standard ProResults' (80.8 per cent), as well as the sonic Waterpik® toothbrush SR 800E with the standard brush head (78.2 per cent), showed statistically significantly better cleaning efficacy than all others. The poorest cleaning efficacy was observed for the oscillating-rotating Braun Oral-B Professional Care with the brush head 'Ortho' (less than 50 per cent). The planimetric findings were in correspondence with the results of the PIOP assessment. Cleaning efficacy of electric toothbrushes around brackets on upper incisors was different between the tested brushes. The PIOP was practicable, effective, and easy to use, although it has to be verified in a clinical stud

Weiterer Kariesrückgang bei Schweizer Rekruten von 1996 bis 2006

Rekruten der Rekrutenschule Thun (N = 606) wurden im Jahr 2006 mit einer standardisierten Methode zahnmedizinisch untersucht. Die Resultate wurden mit denjenigen aus früheren Erhebungen (1985 und 1996) verglichen. Der DM6FT-Wert betrug im Jahr 2006 im Durchschnitt 3,11; im Jahr 1996 lag er noch deutlich höher (4,95). Dies entspricht einem Kariesrückgang von 37%. Der beobachtete Kariesrückgang konnte nur zum Teil erklärt werden. Rekruten, die rauchten, zeigten einen erhöhten Kariesbefall. Rekruten aus der Deutschschweiz, die in Kindergarten und Primarschule von Schulzahnpflege- Instruktorinnen betreut worden waren, unterschieden sich im Kariesbefall nicht von den Rekruten aus der Romandie

Mitochondrial genomes and thousands of ultraconserved elements resolve the taxonomy and historical biogeography of the Euphonia and Chlorophonia finches (Passeriformes: Fringillidae)

© 2020 American Ornithological Society. Relationships of the Neotropical finches in the genera Euphonia and Chlorophonia (Fringillidae: Euphoniinae) have been clarified by recent molecular studies, but species-level relationships within this group have not been thoroughly addressed. In this study, we sampled specimens representing every recognized species of these genera, in addition to 2 outgroup taxa, and used target enrichment to sequence thousands of ultraconserved element (UCE) loci, as well as mitochondrial DNA reconstructed from off-target reads, from each specimen to infer these relationships. We constructed both concatenation and coalescent-based estimates of phylogeny from this dataset using matrices of varying levels of completeness, and we generated a time-scaled ultrametric tree using a recently published fossil-based external calibration. We found uniformly strong support for a monophyletic subfamily Euphoniinae and genus Chlorophonia, but a paraphyletic Euphonia across UCEs and mitochondrial genomes. Otherwise, our inferred relationships were largely concordant with previous studies. Our time-tree indicated a stem divergence time of 13.8 million years ago for this lineage, followed by a relatively young crown age of only 7.1 myr. Reconstructions of biogeographic history based on this tree suggest a South American origin for crown Euphoniinae, possibly resulting from a transoceanic dispersal event from the Eastern Hemisphere, followed by 2 dispersal events into the Caribbean and as many as 6 invasions of North America coinciding with recent estimates of the age at which the Isthmus of Panama had completely formed. We recommend splitting Euphonia and resurrecting the genus Cyanophonia for the 3 blue-hooded species more closely related to Chlorophonia. Based on our results, we suspect that there is undescribed species-level diversity in at least one, possibly many, widespread and phenotypically diverse species